How to wait for a thread to finish in Objective-C

Question

I\'m trying to use a method from a class I downloaded somewhere. The method executes in the background while program execution continues. I do not want to allow program exec

Answer 1

I'd suggest wrapping up call to the class method in your own method, and set a boolean once it completes. For eg:

BOOL isThreadRunning = NO;
- (void)beginThread {   
    isThreadRunning = YES;

    [self performSelectorInBackground:@selector(backgroundThread) withObject:nil];
}
- (void)backgroundThread {
    [myClass doLongTask];

    // Done!
    isThreadRunning = NO;
}
- (void)waitForThread {
    if (! isThreadRunning) {
        // Thread completed
        [self doSomething];
    }
}

How you wish to handle waiting is up to you: Perhaps polling with [NSThread sleepForTimeInterval:1] or similar, or sending self a message each run loop.